MTV & BBC collaboration, and spin-off to the MTV teen series Teen Wolf, where it explains the truth to why Jackson Porter left to London.
Jackson Porter, once a Kanima, now a blue-eyed werewolf, goes to London to find out about his biological parents. Once there, Jackson reluctantly seeks help from a geeky wiz-tech(played by Craig Roberts) to find out about what happened to his parents, why his eyes are blue instead of yellow, and why he was a Kanima in the first place.
During that time, Jackson becomes smitten by a local girl(played by Eleanor Tomlinson), unaware that her step-father(played by Tony Curran) is an Alpha who is plotting something terrifying on London. Matters are complicated more when Jackson is targeted by a veteran hunter(played by Ray Stevenson), who eventually becomes his ally against a common enemy.
NOTE: This would be a very exciting TV show, especially if BBC does a collaboration with MTV and might air it on BBC2(because the entire casts would be British). But if it is not possible, and only on MTV, then I guess it wouldn't really matter. And although Colton Haynes is already starring in TV series Arrow, the show might get cancelled or he might take a break where the character would be on hiatus. Bottom line, I think a spin-off would be definitely excellent.
Colton Haynes as Jackson Porter - The protagonist of this show, and a character previously on Teen Wolf, Jackson left to London(after Deaton informed him that is where he must go) in search of clues about his biological parents, and about himself. In Teen Wolf, Jackson was somewhat of an arrogant douche, but it will be interesting to see how he develops in the spin-off. And it would reveal that he does care about Lydia too much to see her life endanger, and sought to protect her by leaving her. But Jackson become conflicted between her and the next girl he ends up falling for. Jackson would eventually find out that he is a Delta, a type of werewolf that has the ability to choose a mate for life(meaning he can turn someone, but only one, and they have to be someone he truly loves)
Craig Roberts as Harry James - A lonely yet geeky wiz-tech, Harry ends up helping Jackson finding out about his origin, though often he would annoy Jackson. Harry's personality is somewhat similar to Stiles, only without the sarcasm. And he is openly gay. But he is also a bit jealous of Jackson that he's a werewolf sometimes, and sometimes wish he was one too.
Eleanor Tomlinson as Sarah McDonough - Sarah is Jackson's latest love interest(which would make Jackson feel conflicted between her and Lydia). She is very beautiful yet her personality makes her sweet yet sour; her charm is similar to Allison yet her sassiness is similar to Lydia. Sarah is not aware that her step-father is an Alpha until the very end of the series, as well as realising what happened to her mother. It is also hinted that she will be bitten and become a werewolf.
Tony Curran as Robert McDonough - Sarah's step-father and an Alpha werewolf. Shortly after Sarah's mother died, Robert made a vow to look after her and protect her, as if she was his own. But his caring father figure does not change the fact that he is evil. He becomes quite fascinated by Hitler's philosophy of the Aryan race. But he believes that the true 'master race' is not human but werewolves. But Robert knows that a bite could either turn or kill a human, so instead he combines the supernatural with science to create artificial werewolves(wolfmen that are neither Alphas, Betas or Omegas, yet somewhat all of them) and would be unquestionably loyal to him. Robert also owns a big pharmaceutical company(that helps cure sickness) where he plans to create steroid-like drugs with his own DNA, but all it has done is made anyone who takes them into savage animals. Robert is somewhat both cunning and sinister, and plots to take over London, and all of Great Britain using an army of artificial werewolves. It would later be revealed that Robert maybe behind Sarah's mother's death.
Ray Stevenson as William Bane - A veteran werewolf hunter, William has been protecting the city from Robert's artificial werewolves. At first, William has a mistrust towards Jackson, but eventually learns to trust him. It was revealed that his ancestors were hunters which he had not known about, and that he followed the 'family business' after a pack of werewolves killed his family. While although he is somewhat ruthless like Gerard, he does follow the code. And even though he is a human hunter, his personality is somewhat dark and almost similar to Derek Hale's. And William had threatened Jackson's life multiple times, as well as threatened Harry that he'll punch him for his annoyance on two occasions. It is also revealed that he and Robert have a feuding rivalry with one another, and that he knows the Argents. Other than he's skin-headed, William's other feature are four claw-like scars scratched across his face(implying that he always goes up close in killing werewolves).